Welcome and kudos to you for losing the first 10 lbs! Every pound you lose counts, and 5 lbs/week is pretty rapid weight loss in my book!
Anyway, losing weight and getting healthy before baby is a GREAT plan. I intended to lose a significant amount of weight before getting pregnant with my daughter, but we conceived the first month we tried -- much quicker than anticipated (I have PCOS). I was 264 at my first pre-natal appointment, and I did have some weight-related complications like high blood pressure and gestational diabetes. Luckily, both were easily controlled with diet and medication, and I gave birth to a beautiful, healthy girl last May.
We're now thinking about #2. DH wants to start trying this June (he wants the kids to be close in age), but I'm a bit on the fence about timing. I won't be at my goal by then, but I'll likely be out of the "obese" category and much healthier in general. I know that being at a healthier weight won't automatically mean that I won't have high BP or GD, but it certainly can't hurt. And I'd love to stay active as much as possible throughout my pregnancy, which is something I really couldn't do last time.
And wow...I apologize for the long-windedness. I tend to ramble on.